Ensure that a tiny image measuring 1*1 pixel just before the closing </body> tag does not generate unwanted margin

Take a look at this demonstration

Even though I have set the <body> to have no margins whatsoever, a 1*1 image at the bottom of the page is causing a significant margin.

Adding or removing the current CSS reset does not resolve the issue.

What could be causing this problem? The only workaround I can think of is to hide the image, but there must be another solution.

HTML:

<div id="container"></div>
<img src="zzz.png" width="1" height="1"/>

CSS:

#container {
    width: 1080px;
    min-height: 1200px;
    position: relative;
    margin-left: auto;
    margin-right: auto;
    margin-top: 0;
    border-bottom: 0;
    overflow: hidden;
    background-color: green;
    margin-bottom:0;
    padding:0;
}

body {
    color: #FBFBFB;
    background-color: red;
    font-style: normal;
    font-size: 100%;
    vertical-align: baseline;
    border: 0;
    outline: 0;
    padding: 0;
    margin: 0;
    font-family: serif;
    font-weight: 400;
    line-height: 1;
}

a, abbr, acronym, address, applet, article, aside, audio, b, big, blockquote, button, canvas, caption, center, cite, code, dd, del, details, dfn, dl, dt, em, fieldset, figcaption, figure, font, footer, form, h1, h2, h3, h4, h5, h6, header, hgroup, html, i, iframe, img, input, ins, kbd, label, legend, li, menu, nav, object, ol, p, pre, q, s, samp, section, select, small, strike, strong, sub, summary, sup, table, tbody, td, textarea, tfoot, th, thead, tr, tt, u, ul, var, video {
    font-size: 100%;
    font-family: inherit;
    font-weight: inherit;
    font-style: inherit;
    line-height: inherit;
    vertical-align: baseline;
    border: 0;
    outline: 0;
    padding: 0;
    margin: 0;
}
html {
    font-size-adjust: auto;
    -moz-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    -o-text-size-adjust: 100%;
    text-size-adjust: 100%}
article, aside, canvas, details, figcaption, figure, footer, header, hgroup, menu, nav, section, summary {
    display: block;
}

table {
    table-layout: auto;
    empty-cells: show;
}
img {
    vertical-align: middle;
    -ms-interpolation-mode: bicubic;
}

Answer №1

http://example.com/unique-link

<div id="unique-container"></div>
<img src="xyz.png" width="1" height="1" style="float:left"/>

If you're unsure, just float it out to the left.

Make sure to float the image on the left side.

Answer №2

The issue arises from the line-height value of 16px, causing a visible gap.

To resolve this, consider placing the image strategically to avoid creating extra space. Alternatively, you can eliminate the gap by using position: absolute or floating the image as suggested by @Nicholas Young.

Answer №3

To ensure that the 1x1 pixel beacon image does not create any white space, you can set the height attribute to 0 in the img tag and add display: block in the CSS styling.

Regardless of the height or width attributes, the image will still load successfully.

body {
    background-color: blue;
    padding: 0;
    margin: 0;
}
#container {
    width: auto;
    min-height: 600px;
    background-color: yellow;
}
img.beacon {
    display: block;
}
<div id="container"></div>
<img class="beacon" src="xxx.png" width="1" height="0"/>

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